Shipwreck artefact. A  brass ship's porthole recovered from the wreck of S.S. GEMINI which was  torpedoed off St.Ives, Cornwall on 20th July 1918. It has been  re-glazed and converted into an attractive knot board containing 11 knots, bends and hitches.

The details of the shipwreck have been painted around the outside edge of the porthole.